Issue #14702 has been reported by makoto_tajitsu / hotmail.co.jp (Makoto Tajitsu).

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Bug #14702: On Ruby 2.5.1, tracepoint isn't working on the file that is loaded by load_iseq
https://bugs.ruby-lang.org/issues/14702

* Author: makoto_tajitsu / hotmail.co.jp (Makoto Tajitsu)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin16]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
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On Ruby 2.5.1, when loading file with RubyVM::InstructionSequence.load_from_binary, TracePoint callback event is not working on loaded file.

## Steps to reproduce

Ruby version.
```
$ ruby -v
# => ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin16]
```

The example with `yomikomu` gem which is simply used `load_iseq` and `load_from_binary` method to load file quickly is following.
```
$ YOMIKOMU_AUTO_COMPILE=true bundle exec irb

> TracePoint.trace(:line) { |tp| puts tp.lineno if tp.path == '/path/to/somefile.rb' }
# => #<TracePoint:enabled>

> load '/path/to/somefile.rb'
# 3
# 4
# ...

require 'yomikomu'

load './somefile.rb'
# no tracepoint callback for line event
```

On Ruby 2.4.3, this example is working correctly, so tracepoint callback is called and output lineno to stdout when loaded file after `require 'yomikomu'`.



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